Ft Defiance, NN
Tohatchi-Mexican Springs-Twin Lakes NTUA Water System
Consumer Confidence Report status
Tohatchi-Mexican Springs-Twin Lakes NTUA must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for Tohatchi-Mexican Springs-Twin Lakes NTUA.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Navajo Nation’s official records. Always confirm current status with Navajo Nation before making decisions based on this information.
System facts
- System ID (PWSID)
- NN3500237
- System type
- Community Water System
- Population served
- 1,669
- Service connections
- 488
- Ownership
- Native American tribal
- Water source
- groundwater (wells)
Tohatchi-Mexican Springs-Twin Lakes NTUA is among the 21 largest community water systems in Navajo Nation, serving 1,669 people from groundwater.
As of August 1, 2026, its federal record holds 40 entries between 2002 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.
Of the 40, 38 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, the Stage 1 Disinfectants and Disinfection Byproducts Rule, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.
Violation history
Monitoring, Routine (IDSE)
—TTHM
January 1, 2020 – December 31, 2020
ResolvedMonitoring, Routine (IDSE)
—Total Haloacetic Acids (HAA5)
January 1, 2020 – December 31, 2020
ResolvedSample Siting Plan Errors (RTCR)
—Revised Total Coliform Rule
April 1, 2016 – September 30, 2025
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2016 – December 31, 2016
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2016 – December 31, 2016
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
July 1, 2014 – July 31, 2014
ResolvedFailure Submit IDSE/Subpart V Plan Rpt
—Stage 2 Disinfectants and Disinfection Byproducts Rule
October 1, 2013 – February 18, 2025
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
December 1, 2012 – December 31, 2012
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
November 1, 2012 – November 30, 2012
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2012 – December 31, 2012
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2012 – December 31, 2012
ResolvedMonitoring, Regular
—Nitrate
January 1, 2011 – December 31, 2010
ResolvedMonitoring, Regular
—Nitrite
January 1, 2011 – December 31, 2010
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2011 – December 31, 2011
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2011 – December 31, 2011
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2010 – December 31, 2010
ResolvedMonitoring, Regular
—Nitrite
January 1, 2010 – December 31, 2010
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2010 – December 31, 2010
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Benzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Toluene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Styrene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2005 – December 31, 2010
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
April 1, 2002 – April 30, 2002
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | TTHM | — | Resolved |
| January 1, 2020 – December 31, 2020 | Monitoring, Routine (IDSE) | Total Haloacetic Acids (HAA5) | — | Resolved |
| April 1, 2016 – September 30, 2025 | Sample Siting Plan Errors (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2016 – December 31, 2016 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2016 – December 31, 2016 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| July 1, 2014 – July 31, 2014 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| October 1, 2013 – February 18, 2025 | Failure Submit IDSE/Subpart V Plan Rpt | Stage 2 Disinfectants and Disinfection Byproducts Rule | — | Resolved |
| December 1, 2012 – December 31, 2012 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| November 1, 2012 – November 30, 2012 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2012 – December 31, 2012 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2011 – December 31, 2010 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 2011 – December 31, 2010 | Monitoring, Regular | Nitrite | — | Resolved |
| January 1, 2011 – December 31, 2011 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2011 – December 31, 2011 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring, Regular | Nitrite | — | Resolved |
| January 1, 2010 – December 31, 2010 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2005 – December 31, 2010 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| April 1, 2002 – April 30, 2002 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- September 30, 2025State Compliance achieved1 linked violation
- April 29, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- April 29, 2025State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
- February 18, 2025State Compliance achieved1 linked violation
- August 28, 2024State Formal Notice of Violation issued1 linked violation
- July 7, 2021State Compliance achieved1 linked violation
- July 7, 2021State Compliance achieved1 linked violation
- March 31, 2021State Public Notification issued1 linked violation
- March 31, 2021State Public Notification issued1 linked violation
- March 31, 2021State Formal Notice of Violation issued1 linked violation
- March 31, 2021State Formal Notice of Violation issued1 linked violation
- August 28, 2017State Formal Notice of Violation issued1 linked violation
- August 28, 2017State Public Notification issued1 linked violation
- July 25, 2017State Compliance achieved1 linked violation
- July 25, 2017State Compliance achieved1 linked violation
- February 28, 2017State Public Notification issued1 linked violation
- February 28, 2017State Formal Notice of Violation issued1 linked violation
- February 28, 2017State Formal Notice of Violation issued1 linked violation
- February 28, 2017State Public Notification issued1 linked violation
- November 17, 2014State Public Notification issued1 linked violation
- November 17, 2014State Formal Notice of Violation issued1 linked violation
- August 1, 2014State Compliance achieved1 linked violation
- July 23, 2013State Compliance achieved1 linked violation
- July 23, 2013State Compliance achieved1 linked violation
- July 23, 2013State Compliance achieved1 linked violation
- July 23, 2013State Compliance achieved1 linked violation
- July 23, 2013State Compliance achieved1 linked violation
- July 23, 2013State Compliance achieved1 linked violation
- March 12, 2013State Formal Notice of Violation issued1 linked violation
- March 12, 2013State Formal Notice of Violation issued1 linked violation
- January 11, 2013State Compliance achieved1 linked violation
- January 11, 2013State Formal Notice of Violation issued1 linked violation
- December 11, 2012State Compliance achieved1 linked violation
- November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- November 2, 2012State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
- March 1, 2012State Formal Notice of Violation issued1 linked violation
- March 1, 2012State Public Notification issued1 linked violation
- March 1, 2012State Public Notification issued1 linked violation
- March 1, 2012State Formal Notice of Violation issued1 linked violation
- February 29, 2012State Formal Notice of Violation issued1 linked violation
- February 29, 2012State Public Notification issued1 linked violation
- February 29, 2012State Public Notification issued1 linked violation
- February 29, 2012State Formal Notice of Violation issued1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- February 21, 2012State Compliance achieved1 linked violation
- November 17, 2011State Public Notification issued1 linked violation
- November 17, 2011State Formal Notice of Violation issued1 linked violation
- November 17, 2011State Formal Notice of Violation issued1 linked violation
- November 17, 2011State Public Notification issued1 linked violation
- October 21, 2011State Compliance achieved1 linked violation
- December 31, 2010State Compliance achieved1 linked violation
- December 31, 2010State Compliance achieved1 linked violation
- March 20, 2007State Compliance achieved1 linked violation
Common questions
Is Tohatchi-Mexican Springs-Twin Lakes NTUA required to publish a Consumer Confidence Report?
- Yes. Tohatchi-Mexican Springs-Twin Lakes NTUA is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is Tohatchi-Mexican Springs-Twin Lakes NTUA’s next Consumer Confidence Report due?
- Tohatchi-Mexican Springs-Twin Lakes NTUA’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does Tohatchi-Mexican Springs-Twin Lakes NTUA have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for Tohatchi-Mexican Springs-Twin Lakes NTUA.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
Navajo Tribal Utility Authority
9287296277
Ft Defiance, AZ 86504